Pump-plunger rotor



Feb. 23 1926. 1,574,518

l s: B. SARGENT v PUMP PLUNGER ROTOR Filed March 19. 1924 2 Sheets-Sheet1 irro/P/vfxs Feb. 23 1926.

S. B. SARGENT PUMP PLUNGER RoToR Filed March 19, 1924 2 Sheets-Sheet 2Patented Feb. 23, i926.

UNIT-ED STATES s-'UMN'ER n. sAReNf'r', on' Los ANGELES, cALi'FonnrA,Assr'euon To SARGEN'T ENGI- 'NE'RING coRPoRA'rrorr, A conronnrion orALIF'ORNIA.

PUItIP=PLUNGER ROTOR.

Application led March 19, 1924. Serial No.l I?'l`),4'?rli.Y

To aZl fio/tom t may concern.'

Bie it known that I, SUMNER B. SARGENT, a citizen of the United States,residing at Los Angeles, in the county of Los Angeles and State otACalifornia,have invented a new and useful Pump-Hunger Rotor, ot' whichthe following is a speciiication.

This invention relates to pumpingequipment for oil wells, and lrelatesparticularly to means for preserving-an equal wear upon the pumpbar-rel, the pump plunger, and the reciprocating parts of yoil pumpingequipment, as well as overcoming; ditliculties arising from sucker rodsbecoming disconnected and the sanding up of the working parts ot thepump.

is mentioned inmy FatentNo. 1,462,721, granted July 2li, 1923, allowedupon application Serial No. 552,730, tiled April 14,

1922, it is common practice in pumping oil from wells, to employ a.closely fitting' cylindrical steel plunger which rcciprocates in a steelbarrel. In these pumps a preponderance of wear generally occurs upon oneside ot the barrel, thusA causing an `elongated cross-section to resultinstead oi preserving a true circular cross-section by an equaldistribution of wear over the entire surfaces of the barrel land theplunger. It 3U will be seenthat the confinement oft the wear to anycertain portion of the barrel soon creates a space between the barreland the plunger througlfi which a leakage oi oil may occur, and it willbe further seen that such a condition impairs the efficiency of the pumpin amuc'h. shorter time than if thew'ear were equally distributed.Also,l when it is `cle"- sired to res-establish the efficiency of thepump, the barrel and the 'plunger mustbe lifted from the well and al newliner inserted in the barrel. The removal oi a pump barrel entailsconsiderable expenditure in both labor and expense, and also the loss ofproduction whilethe pump is out ot operation.

Another ditiiculty arising in the pun'iping ot oil ironiwells is thatsucker rods become unscrewed this generally' occurring at some point inthe well between the surace and the pump, .andenecessitating fishingiorthe loose end of the line of sucker rods and dra-wing same to thesurface in order' that connection may `aga-in be-r properly made.

It isI an object of my invention te provide a meansv tor rotating theplunger of a pump within thebarrel as the plunger is reciprocated, sothat an equal distribution oi wear will b'e maintained, and therebymaking it possible .to restore the etliciency of the pump by replacingthe yworn plunger with an oversize plunger without the necessityot'removing the barrel from the well.

It is also an object of my invention to provide `a means whereby arotative torce willbe' exertedupon the line of sucker rods in adirection to keep the joints between the sucker rodsscrewed together. y

It is a still further object of my invention to provide ani-mproved-mea'ns for adjusting the amountoi rotation imparted to the sucker rodsandY plunger at each re ciprocation thereot.- Y

Other objects and advantages will be made evident hereinafter. Y YReferring to the drawing which is for illustrative purposes' only:

Fig'. 1 isa somewhat diagramn'iati'c frag mentary elevation showing anoil well .pump equipped wit-hnry device.

Fig. 2 i's a sectional View' taken on a plane represented by the line 22 of F 1.

Fig. isa. vertical .section through Fig. 2.

Fig. L is a. iragmentar'7 View showing a rotation .regulating devicesometimes desirable. of employment upon the device shown in thepreceding figures.

Fig. 5 is a plan View similar to Fig. 2,

sh-owing a term of my invention adapted to rotatek the sucker rodsv andthe plunger during both the up and the down strokes thereof.

Fig. 6 is a-.vertica'l section through Fig. 5.

Fig. is 4a View showing a resilient operating link which maybe used inthe practice of my invention. n

ln Fig. 1. of thev drawing aline oi tubing il shown, having al pumpbarrel 12 attached to its lower end.` Vithi-n the' pump barrel aplu'ngerl is adapted to be vertically rec'iprocated by a. line of suckerrolls 14;, which'are connecte-el; through a polished rod 15 and a'stirrup 18 with a. recipro uiting element such as the walking beam 19.As shownin Figures 2and 3, thelower-ends 20 of the stirrup 18supportrth'e yoke 21 which in turn supports the rotating mechan-ism 22.1

The yoke-21 has a central enlargement- 2l surmounted by a projection 25having the ormation of a horizontal disk, and the polish rod is extendedthrough a hole 26 pro-vided therefor through the yoke 21 and theprojection 25. A head 28 is clamped upon the polished rod 15 above theyoke 21 and serves to transfer the weight of the line ot sucker rods andthe plunger to the projection upon which it rests.

Surrounding the lower portion of the head 28, a driving plate 30 whichis circular in shape, rests'l upon the top surface of the projection Q5,and has upwardly proje-cting therefrom a circular flange 31 which isinteriorly formed to ieceive the hexagonal lower end 32 of the head 28.Adjacent to both the top and bottom `faces of the plate 30, I placeliber rings 33 which are clamped thereagainst by a ratchet wheel 35 anda plate 36 which is of slightly greater diameter than the ratchet wheeland has mounted thereupon a driving ring 37. The ratchet wheel 35 andthe. plate 36 are compressed together with a pressure ofsu'iicientintensity to give the desired driving iunftion between the members 35and 36 and the plate 30 by springs 38 compressed by bolts 34. A

A. bell crank 39 is mounted upon one end of the yoke 21, this bell crankhaving a lateral arm 40 and a vertical arm 41. The arm 40 of the bellcrank is maintained in a position substantially parallel to the walkingbeam 19 by a parallel link comprising an upper portion 43 and a lowerportion 43 as shown in Fig. 1, while thefarm 4l there-- or' engages, asillustrated in Fig. 7, a recess 44 provided in the periphery of thedriving ring 37. From Fig. 1 it will be perceived that as the walkingbeam reciprocates the pumping apparatus connected thereto, the arm 4()of the bell crank 39 will. be partially rotated back and i'orth betweenthe positions indicated by the dotted lines k45 and 46. Thisreciprocative movement is transferred through the arm 41 to the ring 37and provides a means 'for rotating the ratchet wheel 35 by means of aspring retained pawl 48 which engages the teeth 49 of the ratchet wheelwhenever the ring 37 is reciprocatively rotated in the directionindicated by the arrow 50 in Fig. 2. I also provide a stop pawl 51 forpreventing the counter rotation of the ratchet wheel. This pawl 51 ismounted upon a. member 52 rigidly secured upon the yoke 21, and ismaintained against the teeth 49 oic the ratchet wheel by a spring 53.

The frictional drive provided between the ratchet wheel 35 and thedriving plate 430 provides for the movement of the ratchet wheelindependently of the driving plate 3() when the force required to rotatethe plunger 13 exceeds a predetermined amount, thus preventing injury tothe equipment. An additional precaution against injury to the equipmentwhen the plunger becomes sanded in thevbarrel is provided in the novelarrangement of parts which permits the yoke and the driving mechanismsustained thereupon to slide downwardly upon the polished rod, thisbeing possible owing to the fact that the head 28 rests upon theprojection 25 and is free to litt out of engagement with the. drivingplate 30.

In Fig. 4 I show the improved manner in which I regulate the amount ofrotation the plunger shall be given at each reciprocation thereof. Abracket 55 is clamped upon the lett arm 56 oi' the stirrup 13. Thisbracket 55 is provided with a slot 57 having a pin 58 therein whichextends downwardly from the bracket to a posit-ion adjacent to the inner'tace 59 of the pawl 48. YVhen the vring 37 i'eciprocates backward inthe direction ot the arrow 60, the pawl is lifted from engagement withthe teeth 49 by the pin 58. Upon the forward stroke, as indicated by thearrow 61, the pawl cannot engage the teeth until a certain point in therotation of the ring is reached; thus it is possible to adjust thepin 58within the slot 57 to provide the engagement of a. certain predeterminednumber of teeth at each reciprocation of the ring 37. The pin 53 may beclamped within the slot by any suitable means.

It is desirable in some installations to provide for the rotation of theplunger during both the upward and downward strokes thereof. This isaccomplished as shown in Figures 5 and 6, by placing a second drive ring64 upon the drive ring 37, this ring 64 being provided with a projectingportion 65 having a recess 61 engaged by the vertical ari'n 67 of a bellcrank 68, which is mounted upon the end of the yoke 21 opposite to thebell crank 39. A spring retained pawl 69 is adapted to rotate theratchet wheel 35 in the same direction as it is rotated by the pawl 48.

As hereinbefore explained it is evident from Fig. l that the arms 40 and7l of the bell cranks are rotated upwardly through a partial revolutionduring the down stroke, and downwardly during the up stroke. lVhen thearm 40 is raised during the downward stroke, the ring 37 is reciprocatedin the direction of the arrow 75, the pawl 48 coming into engagementwith the teeth 49,

and the ratchet wheel thereupon being ro- I tated in a clockwisedirection. During the upward stroke, the lateral arms of the bell cranksare revolved downwardly, causing the movement of the ring 37 in adirection opposite to that indicated by the arrow 75,

-while the ring 64 is reciprocated in the direction of the arrow 76causin the engagement of the pawl 69 with teeth 49, and the rotation ofthe ratchet wheel in a clockwise direction again results; this latterrotation being during the upward stroke while the former rotation wasaccomplished during the downward stroke. p

In Fig. 7 I illustrate means whereby the plunger may not rotate when thefrictional resistance between the plunger and the barrel exceeds acertain point. The parallel link to which the characters 43 and 43 areapplied in Fig. l, may be represented by a resilient link 43, 43connected between the walking beam 19 and the arm 40 of the bell crank89. A simple and eiiicient construction of this resilient link consistsof a frame composed of plates 79 and 8O having parallel slide rods 81extending therebetween; the link section 43 extending from the plate 79and having connection with the arm 40 of the bell crank; a cross head 85adapted to slide on the rods S1, having a rod 86 extending upwardlytherefrom passing through a hole 87 provided in plate 80 and makingconnection with a pin 88 mounted upon the walking beam 19; and a spring90 compressed between the plate 8O and the cross head 85, this springholding the cross head forcibly against the plate 79, but permitting thelink to be extended when a resistance is exerted thereupon through thebell crank.

The movement of the bell crank 39 may be varied to provide differentrates of feed -of the ratchet plate by moving the pin 88 upon thewalking beam 19, elther to the right or left in the direction of theindication 92, to change the action of the parallel link.

I claim as my invention:

1. In a device of the class described, the combination of: a polishedrod; a head mounted upon said polished rod; yoke means supporting saidhead; reciprocating mechanism for rotating said head; a crank forreciprocating said mechanism, link members connecting between said yokemeans and a vertically rotatably reciprocating arm and a resilientlyconstituted parallel link connect# ing between said crank and said arm.

:21. In a device of the class described, the

combination of: a polished rod; a head mounted on said polished rod;yoke means supporting said head; reciprocating mechanism for rotatingsaid head; a crank for reciprocating said mechanism; link membersconnecting between said yoke means and a vertically rotatablyreciprocating arm; parallel link connecting means between said crank andsaid arm, said last mentioned link containing resilient means adapted tobe flexed when resistance of rotated members against rotation exceeds apredetermined value.

3. In a device of the class described, a polished rod, a head thereon, awalking beam, means for reciprocating said head from said walking beam,means operable by a link extending from said walking beam toward saidhead for rotating said head from said walking beam, and a compressionspring so disposed in said link as to render said rotating meansinoperative when a predetermined resistance is encountered.

4. In a device of the class described, a polished rod, a head thereon, awalking beam, means for reciprocating said head from said walking beam,means for rotating said head from said walking beam, and meansautomatically rendering said rotating means inoperative when apredetermined resistance is encountered, said lastmentioned meanscomprising a resilient link.

5. In a device of the class described, a polished rod, a head thereon, awalking beam, means for reciprocating said head from said walking beam,means for rotating said head from said walking beam, and meansautomatically rendering said rotating means inoperative when apredetermined resistance is encountered, said last mentioned meanscomprising a resilient link containing a spring.

In witness whereof, I have hereunto set my hand at Los Angeles,California, this 12th day of March, 1924.

SUMNER. B. SARGENT

